# Dockerfile for Savvi-AI Next.js application

# 1. Base Image
# Use an official Node.js runtime as a parent image.
# Using 'slim' for a smaller image size.
FROM node:20-slim

# 2. Set Working Directory
# Create and set the working directory inside the container.
WORKDIR /app

# 3. Install Dependencies
# Copy package.json and install dependencies.
# This is done in a separate step to leverage Docker's layer caching.
# The layer will only be rebuilt if package.json changes.
COPY package.json ./
RUN npm install

# 4. Copy Application Code
# Copy the rest of your app's source code from your host to your image filesystem.
COPY . .

# 5. Build the Application
# Build the Next.js app for production.
RUN npm run build

# 6. Expose Port
# The Next.js app runs on port 3000 by default.
EXPOSE 3000

# 7. Start the Application
# Define the command to run the app.
# The `start` script is defined in package.json as "next start".
# We pass -p 3000 to be explicit about the port.
CMD ["npm", "start", "--", "-p", "3000"]